2 years ago

The variable y varies directly with the variable x.

Mathematics

1 answer:

almond37 [142]2 years ago

7 0

if the value of X is 14 then the value of y is 21

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Solve the equation : 2x + 7 = 21 and find the value of x. Is 2x + 7 = 21 a first degree equation or not?

Paraphin [41]

Answer:

The proposed equation is solved as follows:

2X + 7 = 21

2X = 21 - 7

2X = 14

X = 14 / 2

X = 7

The value of X is 7.

A first degree equation is an algebraic equation in which each term is either a constant or a product of a fixed term on a single variable. Therefore, this equation is a first degree one, since it only has a single variable, which is X.

4 0

2 years ago

Ariel made cupcakes to sell. 2/3 of them were chocolate chip,25% of the reminder was strawberry and the rest were 90 vanilla cup

Anton [14]

Answer:

Let x be the total number of cupcakes.

Chocolate chips =

$\frac{2}{3} x$

Strawberry =

$\frac{1}{4} \times \frac{1}{3} \\ = \frac{1}{12} x$

Vanilla =

$x - \frac{2}{3} x - \frac{1}{12}x \\ = \frac{1}{3} x - \frac{1}{12} x \\ = \frac{1}{4} x$

given

$\frac{1}{4} x = 90$

$x = 90 \div \frac{1}{4} \\ = 90 \times 4 \\ = 360$

a)Number of Chocolate chip Cupcakes =

$\frac{2}{3} \times 360 \\ = 240$

b)Number of Strawberry cupcakes =

$\frac{1}{12} \times 360 \\ = 30$

8 0

3 years ago

Complete the identity, sin(a+b)/cosacosb=

8090 [49]

Answer:

tana + tanb

Step-by-step explanation:

Using the trigonometric identities

• sin(a + b) = sinacosb + cosasinb

• tanx = $\frac{sinx}{cosx}$ , then

$\frac{sin(a+b)}{cosacosb}$

= $\frac{sinacosb+cosasinb}{cosacosb}$

= $\frac{sinacosb}{cosacosb}$ + $\frac{cosasinb}{cosacosb}$

= $\frac{sina}{cosa}$ + $\frac{sinb}{cosb}$

= tana + tanb

5 0

3 years ago

Can yall please help me answer all these

Anettt [7]

#1 is 60\100 which can be reduced to 3\5

7 0

3 years ago

Read 2 more answers

Find three consecutive numbers that add up to 60

lawyer [7]

Answer:

60/3=20

20/21

Step-by-step explanation:

6 0

3 years ago